Phase assemblage of composite cements
Abstract
The phase assemblage of binary Portland cements with 45 wt% replacement by calcareous fly ash and slag has been investigated by experiment, mass balance and thermodynamic simulations. The input for these calculations was based on clinker reaction measured by XRD-Rietveld refinement, on SCM reaction measured by SEM-EDS full element mapping and on C-S-H composition by SEM-EDS point analyses. A sensitivity analysis estimates the uncertainty of determination of phase volume as at best ± 2 cm{sup 3}/100 cm{sup 3}, and thus of rather semi-quantitative character. The differences between experiment and calculations regarding AFt/AFm, C-S-H and portlandite were assessed. Gel/space ratios computed using the volumes of all hydrates showed a clear correlation to compressive strength, which was unaffected by the mix composition. This suggests that the type of hydrates formed has little or no influence on the compressive strength and that the key factor is the space filling.
- Authors:
-
- HeidelbergCement Technology Center GmbH (HeidelbergCement AG), Rohrbacher Str. 95, 69181 Leimen (Germany)
- Laboratory of Construction Materials, École Polytechnique Fédérale de Lausanne (EPFL), Station 12, CH-1015 Lausanne (Switzerland)
- Publication Date:
- OSTI Identifier:
- 22701569
- Resource Type:
- Journal Article
- Journal Name:
- Cement and Concrete Research
- Additional Journal Information:
- Journal Volume: 99; Other Information: Copyright (c) 2017 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0008-8846
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 36 MATERIALS SCIENCE; ATOMIC FORCE MICROSCOPY; COMPRESSION STRENGTH; FLY ASH; HYDRATES; HYDRATION; PORTLAND CEMENT
Citation Formats
Durdziński, Paweł T., E-mail: pawel.durdzinski@gmail.com, HeidelbergCement Technology Center GmbH, Ben Haha, Mohsen, Zajac, Maciej, and Scrivener, Karen L. Phase assemblage of composite cements. United States: N. p., 2017.
Web. doi:10.1016/J.CEMCONRES.2017.05.009.
Durdziński, Paweł T., E-mail: pawel.durdzinski@gmail.com, HeidelbergCement Technology Center GmbH, Ben Haha, Mohsen, Zajac, Maciej, & Scrivener, Karen L. Phase assemblage of composite cements. United States. https://doi.org/10.1016/J.CEMCONRES.2017.05.009
Durdziński, Paweł T., E-mail: pawel.durdzinski@gmail.com, HeidelbergCement Technology Center GmbH, Ben Haha, Mohsen, Zajac, Maciej, and Scrivener, Karen L. 2017.
"Phase assemblage of composite cements". United States. https://doi.org/10.1016/J.CEMCONRES.2017.05.009.
@article{osti_22701569,
title = {Phase assemblage of composite cements},
author = {Durdziński, Paweł T., E-mail: pawel.durdzinski@gmail.com and HeidelbergCement Technology Center GmbH and Ben Haha, Mohsen and Zajac, Maciej and Scrivener, Karen L.},
abstractNote = {The phase assemblage of binary Portland cements with 45 wt% replacement by calcareous fly ash and slag has been investigated by experiment, mass balance and thermodynamic simulations. The input for these calculations was based on clinker reaction measured by XRD-Rietveld refinement, on SCM reaction measured by SEM-EDS full element mapping and on C-S-H composition by SEM-EDS point analyses. A sensitivity analysis estimates the uncertainty of determination of phase volume as at best ± 2 cm{sup 3}/100 cm{sup 3}, and thus of rather semi-quantitative character. The differences between experiment and calculations regarding AFt/AFm, C-S-H and portlandite were assessed. Gel/space ratios computed using the volumes of all hydrates showed a clear correlation to compressive strength, which was unaffected by the mix composition. This suggests that the type of hydrates formed has little or no influence on the compressive strength and that the key factor is the space filling.},
doi = {10.1016/J.CEMCONRES.2017.05.009},
url = {https://www.osti.gov/biblio/22701569},
journal = {Cement and Concrete Research},
issn = {0008-8846},
number = ,
volume = 99,
place = {United States},
year = {Fri Sep 15 00:00:00 EDT 2017},
month = {Fri Sep 15 00:00:00 EDT 2017}
}